Single-disk grain-drill.



G. B'. DBMPSTER, W. ELLIOTT & R. H. SCHLAGHTER. SINGLE DISK GRAIN DRILL.

' APPLICATION FILED APR. 17, 1912.

1,085,55 1 Patented Jan. 27, 1914.

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COLUMBIA WRAP" 50.,WASMINOTON, u, c.

G. B. DBMPSTER, W. ELLIOTT & R. H. SCHLAGHTER.

SINGLE DISK GRAIN DRILL. APPLICATION FILED APR.17, 1912.

11,085,55 1 Patented J an. 27, 1914.

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r 7 17 ll Mi i 43 W l m/twwoeo j I. c 'M J 3 fl? M 75 3 $513 COLUMBIAPLANDGRAPH 20., WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

TRICE, NEBRASKA, ASSIGNORS T0 DEMPSTER MILL MANUFACTURING COMPANY, OFBEATRICE, NEBRASKA, A CORPORATION OF NEBRASKA.

SINGLE-DISK GRAIN-DRILL.

Specification of Letters Patent.-

Patented Jan. 27, 1914.

Application filed April 17, 1912. Serial No. 691,477.

To all whom it may concern:

Be it known that we, CHARLES B. DEMP- STER, l/VILLIAM Enron, and ROBERTH. SCHLACHTER, citizens of the United States, residing at Beatrice, inthe county of Gage and State of Nebraska, have invented cer tain new anduseful Improvements in Single-disk Grain-Drills, of which the followingis a specification.

This invention relates to certain improvements in grain drills and moreparticularly to improvements in and relatlng to slngle disk centerdelivery grain drills; and the objects and nature of the invention willbe readily understood by those skilled 1n the art in the light of thefollowing explanat on of the accompanying drawing illustrating what wenow believe to be our preferred embodiment from among other formationsand arrangements within the spirit and scope of the invention.

It is an object of the invention to provide a single disk centerdelivery grain drill with certain improvements whereby the gram will bedelivered at a point approximately directly below the disk axis and atthe lowest portion of the disk edge and hence substantially into thedeepest portion of the furrow or directly into the bottom of the furrowapproximately beside said lowest portion of the disk edge whereby theseed can be deposited at the required depth without setting the disk tocut deeper than said required depth.

A further object of the lnvention 1s to provide a single disk graindrill with an open shield forming a scraper 1n connection with meanswhereby said shield can be adjusted to maintain the cleaning or scrapingrelation with respect to the disk.

A further object of the invention is to provide a grain drill having adisk furrow opener with an improved center delivery open shield at itsfront edge fitting the disk to exclude trash and the like.

A further object of the invention is to provide certain improvements inarrangements and combinations of parts and in formation and constructionof elements whereby an improved and highly efficient single disk centerdelivery grain drill will be produced.

The invention consists in certain novel features in construction and incombinations and arrangements as more fully and partlcularly set forthand specified hereinafter.

Referring to the accompanying drawings :Figure 1, is a side elevation.Fig. 2, is a vertical section on the line 22, Fig. 1. Fig. 3, is ahorizontal section on the line 33, lug. 1. Fig. 4, is a horizontalsection on the line H, Fig. 1. Fig. 5, is a detail perspective of thelower outer side portion of the boot. Fig. 6, is a detail perspective ofthe shield showing the inner or concave side thereof. Fig. 7, is adetail perspective of the lower inner side portion of the boot, showingthe disk bearing block separated therefrom.

In the drawings, we show a vertically disposed approximately straighthollow boot 1, formed or provided with means 10, for the attachment ofthe drag bar, as will be readily understood by those skilled in the art.This boot carries a single cutter, or furrow opening disk 2, locatedbeside the boot and rotatable on an axis arranged transversely of theboot and at the lower end thereof. The boot extends downwardly at theconvex or landside of the disk, and at its lower end the boot isprovided with a suitable bearing or journal for the disk. In thespecific example illustrated, this bearing consists of a circular ordisk-like bearing block 3, having a central depressed recess 30, in itsouter face or end and a reduced central or concentric cylindrical bossor neck 31, projecting laterally from its opposite or inner side or end.The outer end face of this cylindrical concentric boss 31 is formed witha depressed squared or angular socket 32, to receive the correspondinglyshaped lug 11, rigid with the boot and projecting laterally from theside face of the lower end of the boot. The end face of the boss 31,abuts against the side face of the boot around the lug 11. The lug fitsthe socket in the boss end and holds the bearing block against rotation.The bearing block is removably secured and clamped to the boot by a bolt33, passing removably and centrally through the bear ing block andscrewing into the lug and boot. The head of the bolt is located andaccessible in the recess 30, in the outer end of the bearing block. Thecylindrical boss 31, maintains the enlarged cylindrical or circularportion of the bearing block spaced laterally a distance from the sideof the boot.

The cutter or disk is carried by and provided with a central journal boxreceiving and rotatable on said block and whereby the disk is confinedto the boot and in proper position with respect thereto to move forwardtherewith at the desired furrow forming angle. This ournal box isarranged at the concave side of the disk and consists of a pair ofcircular parallel plates i, 10, between which the bearing block isconfined, the circumferential edge portions of the plates beyond thecircumference of the block being riveted, or otherwise rigidly securedtogether and to the rotary disk. The central portion of the disk isremoved or formed with an enlarged central opening. The plate 4, spansthe opening in the disk and forms the inner wall of the box and abutsthe inner end or side of the bearing block, and is formed with a centralopening snugly receiving the cylindrical boss 31, of the hearing blockand rotating thereon. The central portion of the plate rt, around theopening therein, is depressed or dished outwardly or in a direction awayfrom the adjacent face of the bearing block, see 4-1, to form an annularsocket receiving packing ring 42, located at the angle between the bossand side face of the block and forming a comparatively tight seal forthe retention of lubricant and for the exclusion of grit and the like.The plate 40, forms the outer wall of the box and abuts the outer end orface of the bearing block and is centrally dished to embrace and fit thecircumference of said block and to provide the exterior flange fittingdown on the outer edge portion of plate t, resting flat against theconcave face of the disk, and to receive the transverse securing rivets4 3. The center of the plate 40, is formed with an opening into recess30, for oiling and for access to bolt 33, and this opening is normallytightly closed by a suit able cap or plug ist, a screw cap being usuallyemployed for this purpose. The journal box forms a permanent part of thedisk and the bearing block is permanently confined in said box, andthese parts can be eadily removed from the boot when bolt 33, has beenunscrewed from the boot. This bolt turns freely in the bearing block andscrews into a threaded hole in the boot and merely serves to tightlyclamp said block to the boot.

If so desired, the boot can be formed with a guard flange or deflector12, at its rear side next to the disk to deflect dirt from the boss 31,and the dished center of plate 4t, rotating on said boss. The lower openend of the boot proper terminates about opposite the central. portion ofthe convex side of the rotary disk and spaced laterally a distancetherefrom, so that the seeds drop vertically through the boot and fromthe lower open end thereof. The seeds drop from the boot onto (or intothe passage formed by) a shield 5, forming a downward approximatelyvertical continuation of the seed passage of the boot along the convexside of the disk and discharging beside approximately the lowest portionof the disk. This shield is concaveconvex in cross section and from itsupper end longitudinally curves or inclines downwardly and inwardlytoward the surface of the disk. The shield can be composed of a singlesteel (or other material) blade having its front longitudinal edge 50,formed throughout its length to fit the convex sur face of the disk andconstitute a scraper for scouring said surface of the disk and forpreventing passage of trash or the like into the seed passage formedbetween the shield and surface of the disk. The usually straightvertical rear longitudinal edge 51, of the shield is preferably spaced adistance from the surface of the disk so as to leave the said seedpassage open at the rear from the lower end of the boot down to thepoint of the shield formed by the lower end of the scraper edge 50. Theedge 50 usually curves downwardly and rearwardly and is usuallytransversely ground ofi' or beveled to provide a comparatively wide edgeclosely fitting the surface of the disk and to form a sharp or knifefront edge to scrape and scour the surface of the rotating disk as ittravels rearwardly in close contact with said front edge portion of theshield. The seeds are guided and confined by this shield to drop fromthe lower open end thereof just in rear of the rcarwardly deflectedlower end of the edge 50, and beside the lowermost portion of the diskand hence directly onto the very bottom of the furrow approximately assaid lowermost portion of the disk completes the cut forming the furrow.The shield extends down to within a short distance of the lowermost edgeportion of the disk directly below the axis of the disk. The arrangementis such that the disk can be set to cut to a depth equal to the depth atwhich the seeds are to be planted thereby reducing the draft requiredwhere the disk must cut to a greater depth than that at which the seedsare to be planted.

It is desirable to maintain the front longitudinal edge of the shieldapproximately throughout its length in contact with the surface of thedisk for the purposes of scouring the surface of the disk and excludingtrash from the seed passage between the shield and disk. If this edge ofthe shield becomes separated from the surface of the disk trash isliable to work in between the disk and shield and not only stop therotation of the disk but also clog and choke the seed passage. Vi ehence provide means whereby the shield can be readily adjusted toconstantly maintain the desired fit between the shield and disk. In theexample illustrated, the transversely concaved inner face of the upperor large end of the shield fits correspondingly transversely curved orconvexed outer surface or surfaces 13, of the lower end of the boot sothat the front scraping edge of the shield can be moved to and from thesurface of the disk by bodily sliding the shield transversely on saidrounded seat 13. The shield depends from and is secured to and carriedby the boot, and in the specific example illustrated, headed bolts 6,are employed for this purpose. These bolts extend inwardly through slots55, in the upper portion of the shield and elongated transverselythereof, and screw into threaded holes in the lower portion of the boot,with the bolt heads exposed and readily ac cessible at the exterior ofthe shield and designed to tightly clamp the shield against the convexedseat of the boot. On loosening the bolts, the shield can be adjustedtransversely to bring its front edge into the desired close contact withthe surface of the disk, and the bolts can then be easily tightened tolock the shield in the desired adjustment.

It is evident that various changes, variations, and modifications mightbe resorted to in the forms, constructions, arrangements andcombinations set up without departing from the spirit and scope of ourinvention, and hence we do not wish to limit ourselves to the exactdisclosure hereof but consider ourselves entitled to all such departuresand equivalents as fall within the spirit and scope of our invention.

WVhat we claim is 1. In combination, a boot having a transversely curvedportion, a rotary disk arranged at the inner side of the boot andcarried thereby, and a vertically disposed transversely concaved bladeadjustably secured to said curved portion of the boot and dependingtherefrom along the surface of the disk from its central portion to thelower edge portion thereof to guide the seeds dropping from the boot anddeliver the same into the furrow, said boot and blade being arranged inthe plane of the vertical diameter of the disk, the front longitudinaledge of said blade conforming to the surface of the disk and to engageand scour the same and prevent access of trash to the seed passage.

2. In combination, a boot at the inner side of its lower end having abearing, a rotary disk arranged at the inner side of the boot andmounted on said bearing, said boot at its outer side having a seatconvexed transversely of the boot, a blade transversely concaved at itsinner side and fitted on said seat, means securing said blade to saidboot and providing for transverse sliding adjustment of the blade onsaid seat, said blade having its concaved side next to the disk andextending from the boot to the lower edge portion of the disk and havingits front longitudinal edge forming a scraper and adapted to engage thesurface of the disk, said blade forming a direct downward continuationof said boot in the diameter of said disk.

3. In combination, in a single disk grain drill, a boot having abearing, a rotary furrow-opening disk mounted on said bearing, said boothaving a seat curved transversely thereof, a blade vertically andcentrally arranged with respect to the axis of rotation of said disk andforming a direct downward continuation of the seed passage of said bootalong the side surface of the disk ap proximately to the lowest portionthereof directly below the seed passage of the boot and having its frontlongitudinal edge curved to conform to the curvature of the disk andtransversely ground to abut the surface of the disk and form a scraper,said blade having a transversely curved portion engaging said seat, andmeans securing said blade to said boot and providing for slidingadjustment of the blade on said seat.

4. A single-disk center-delivery grain drill comprising averticallydisposed boot having a bearing block arranged entirely at theinner side of its lower end, a furrow opening disk mounted on said blockand arranged at the inner side of the boot, a vertically-disposed shieldforming a downward continuation of said boot along the outer surface ofthe disk and extending approximately to the lowermost edge portion ofthe disk, said shield being composed of a blade concaved at its innersurface to form a grain passage along the surface of the disk, and meansadjustably securing the upper end of the blade to the lower end of theboot and providing for transverse adjustment of the blade to maintainits front edge in operative relation with the surface of the disk, theseed passage formed by the boot and blade being approximately arrangedin the plane of the vertical diameter of the disk.

5. A single-disk center-delivery grain drill comprising avertically-disposed boot, a furrow-opening disk mounted at the innerside of the lower end of the boot, the grain passage within the bootbeing approximately vertical and centrally arranged with respect to theaxis of rotation of the disk, and a shield secured at its upper end tothe lower end of the boot and providing a grain passage in verticalcontinuation of the grain passage of the boot and extending along thesurface of the disk with a discharge approximately at the lowest portionof the disk, said shield composed of a concaved blade having its frontlongitudinal edge curved to form a scraper along the surface of thedisk, means being provided for permitting transverse adjustment of theblade on the boot, without disturbing the vertical plane of thevertical, 7o

relation of the blade,- tounaintainthe operative relationobetween the;front" edge of the.-

blade andthe surface. of1the disk.

(LA. single-disk, center-deliverygrain.

5, drill: comprising a; vertically. disposedi boot,

a furrow-opening disk mountedaattheinner passage within the. boot beingapproxiinately verticaland centrallyarranged with respect to the axis ofrotation-of the disk and;lo-

cated in the plane of the vertical diameterof the disk, and a shieldsecured atits-upper end to the lower end. of the. boot and providing agrainpassage. in continuation of the grain passage of'the boot. alongthe sun face, of the Cl1Sl.Wlth asd1scharge approximatelyat thelowestportion of'the disk, said shield composed of a concaved blade havingitsv front; longi-tudinal1edge forming a scraper along thesurface ofthe. disk.

7. A single-disk. centeredelivery. grain drill comprising a supporthaving a. verti- 25, cally disposed-seed passage, aibearing blockcarried by and arranged atzone-side of said support, said. support: atits.- opposite sidehaving a. seat,. arotary disk. mounted on saidblock,and a depending transversely.- 3Qi concaved blade fittingandtransversely adjustable on and normally. fixedrto said seat with itsfront longitudinal edge, cooperating with the surface of? Silltl diskto: form a scraper, said blade forming a seed. passage extending fromthe seedpassage of said:

support along the. surface of the diskto the lower edge portion thereof,said seed pas-= being vertically and centrally arranged. with respect tothe AXIS of rotation Of'SflKl 40 disk.

8. In a single-disk center-delivery grain drill, in combination, a boot,a furrow-open-. ing disk carried thereby and arranged beside the same, ablade extending from the-boot along the disk to the lower edge portionthereof, said blade being transversely con to the curvature of the diskand to engage the same in scraper relation, and means whereby said ladecan be transversely ad- 60, justed with respect to the boot to maintainthe scraper relation between the front edge of the blade and the surfaceof the disk.

9. In a grain drill, in combination, a boot provided with a bearingblock arranged at the inner side of its lower end, a rotary disk:Confinedby and rotating on said blockand held thereby spaced from theboot, a blade depending-from the boot along. the surface vof said diskto the'lower edge portion thereof: and concavedi at its surface nexttothe disk to form a seed passage from the boot discharging at: thecentral lower edge portion of"thedisk: directly below the seed passageof the boot, the front longitudinal edge of. said blade adaptedto engagethe surface ofthe disk to form a scraper, the transversely curved upperportion ofthe blade fitting and transversely adjustable on the lower.end of the boot opposite thecentral portion of the disk and having aslot elongated transversely of the blade, and a securing bolt passingthrough said slot and clamping the blade to the boot.

10. A single-disk center-delivery grain drill comprising a boot, arotary disk carried thereby, said boot at'its lower end havingatransversely curvedseat, a shield depending from said boot along thesurface of the disk and forming a grain passage in downward continuationof the passage of the boot and vertically and centrally arranged withrespect to the axis of rotation of said disk, said shield composed of adownwardly-tapered vertically-elongated scraperformingnarrow concavedblade at its transversely curved-upper end fitting andslidably'adjustable on said scat, and'means for adjustably securing saidblade to said seat and against vertical movement with respect to theboot.

11. A single-disk center-delivery grain drill comprising a rotaryfurrow-opening disk, a seedtube forming a boot and arranged entirely atthe land side of said disk, the inner side wall of the seed passage ofsaid tube provided with and carrying an exterior bearing on which saiddisk is mounted, whereby said seed passage traversesthe axial line ofrotation of said disk and is not obstructed thereby, and a verticalscraper forming longitudinally concaved blade depending from the lowerend of said tube along the-land side of said disk approximately to thelower edge of said disk, and forming a seed passage arranged in theplane of the lower vertical radius of the disk-and in downwardcontinuation of the seed passage of said tube.

12. Asi-ngle-disk grain drill comprising a seed tube, forming a boot,provided with an exterior bearing, a furrow opening disk arranged onandcarried by said bearing, the outer side of the lower end of said tubebeing transversely rounded to form a convexed seat, a scrapcr-fm'mingblade formed to constitute a downward continuation of the seed passageof said tube along the surface of said. disk approximately to the loweredge portion thereof, the upper end of said blade being concaved toreceive said rounded outer side of the lower end of said tube, the frontlongitudinal portion of said blade transversely extending directlyinwardly toward the surface of the disk to squarely abut the frontlongitudinal edge of the blade against the surface of the disk forexcluding trash from the seed passage between the blade and disk, saidblade being bodily rotatable on said end of said tube to adjust saidedge to squarely abut the surface of the disk without substantial bodilyforward movement- 1 Copies at thll patent may be obtained for five centseach, by addressing the of the blade along the disk, and means forrigidly securing said blade to said tube and in the desired adjustment.

In testimony whereof we aflix our signa- 15 tures in presence of twowitnesses.

CHARLES B. DEMPSTER. \VILLIAM ELLIOTT. ROBERT H. SGHLAGHTER. Witnesses:

R. H. YALE, V. O. RANKIN.

Gommiuioner of Patents,

walhington, D. C.

